Product Review

- Quantity: 3 pack
- 120dB loud alarm voice
- High sensitive detect board
- 3M double side paster for easy install
- 37.8 inches cable, easy extend by user
- Supply by 9V battery (not include), battery life will be about 12 months for normal use
(low quality battery about 6 months, very high frequency alarm or testing, battery life will be shorter)

Note: If the detection board is placed directly on metal, please put a piece paper under the board to avoid false alarms.